Skip to main content
Skip header

Optical Communications I

Type of study Follow-up Master
Language of instruction Czech
Code 440-4114/03
Abbreviation OK I
Course title Optical Communications I
Credits 5
Coordinating department Department of Telecommunications
Course coordinator doc. Ing. Jan Nedoma, Ph.D.

Osnova předmětu

- Introduction to telecommunications and optical fibers - history and development of transmission properties and parameters of optical fibers, fiber optic communication systems, basic block diagram of optical information transmission, current state in optical systems, future development trends
- Fundamentals of optical fibers I - light conduction in optical fibers, complete reflection at the core-shell interface, refractive indices of the core and shell, cut-off angle at the core-shell interface and cut-off angle, introduction of light into the optical fiber, reception cone, numerical aperture
- Basics of optical fibers II - mode and chromatic dispersion, solution of mode dispersion - gradient fibers, single-mode fibers
- Basics of optical fibers III - chromatic dispersion, mechanism of chromatic dispersion, calculation of pulse propagation by chromatic dispersion, definition of transmission speed and - - - Basics of optical fibers IV - catalog parameters of optical fibers, general parameters, optical characteristics, geometric characteristics of optical fibers, specification of working conditions of optical fibers, mechanical characteristics, other characteristics
- Fundamentals of single-mode fibers I - principle of single-mode fiber operation, Gaussian bundle, influence of core and sheath on mode field diameter MFD, limiting wavelength of SM fiber, attenuation of SM fibers, macro-bending losses, micro-bending losses, light absorption and scattering in SM fibers, dispersion and bandwidth of SM fibers
- Basics of single-mode fibers II - chromatic dispersion, material dispersion, waveguide dispersion, conventional fibers, fibers with shifted dispersion characteristic, fibers with flat dispersion characteristic, polarization mode dispersion (PMD), bandwidth and transmission speed of SM fibers, catalog parameters of SM fibers , general characteristics, transmission characteristics, MFD and limiting wavelength, geometrical characteristics, mechanical properties of SM fibers
- Basics of sources for optical communications (laser) - basic properties of lasers, spontaneous and stimulated emission, population inversion, positive feedback, material losses, laser activity and laser transfer characteristics, characteristics and properties of laser light,
- Basics of sources for optical communications (LED) - advantages and disadvantages of LEDs in comparison with laser diodes, formation of photons in semiconductors, formation of light at PN junction, basic description and characteristics of LEDs, homogeneous LED transitions, LEDs on heterostructures, surface emitting LEDs ( SLED), edge-emitting LED (ELED), LED-optical fiber light coupling, technology to improve coupling, LED catalog parameters, LED modulation bandwidth
- Basics of receivers for optical communications - basic requirements for optical detectors, basic principles and arrangement of photodetectors, photodiode on PN junction, resistance and photovoltaic mode, photodiode sensitivity, photodiode spectral behavior, longwave limit of photodetector, photodetector resolution, photodetector bandwidth, spare photodiode scheme, limitation and control of photodiode response speed
- Basics of receivers for optical communications - PIN photodiode, avalanche photodiode (APD), MSM detectors
- Introduction to measurement of optical fibers and cables - types of measurements, measurements on SM and MM fibers and cables, attenuation measurement, conditions of attenuation measurement, two-length method, direct method, OTDR-meter, basic parts of the instrument, dead zones of measurement, curve backscatter, cable factor, shape of faults on the backscatter curve
- Introduction to fiber optic networks - basic concepts of fiber optic networks, terminology of fiber optic networks, optical network nodes, WDM networks and their variants, management of fiber optic networks

E-learning

The materials are available in the LMS system or by agreement with the subject guarantor.

Povinná literatura

[1] Ghatak,A.K., Thyagarajan,K.: Introduction to fiber optics. Cambridge University Press, 1st edition, 1998, ISBN 0-521-577853
[2] Agrawal,G.P.. Fiber optic communication systems. J.Wiley and Sons, 1st edition, 1992, ISBN 0-471-54286-5
[3] Papen,G.C., Blahut, E.R.: Lightwave Communications. Cambridge University Press, 2019, ISBN 978-1-108-42756-2
[4] Lam,C.: Passive Optical Networks, Principles and Practice. Elsevier 2007, ISBN 978-0-12-373853-0

Doporučená literatura

[1] Filka,M.: Optoelectronics for telecommunications and informatics. ProfiberNetworking CZ,s.r.o., ISBN 987-80-86785-14-1